Paper feed mechanism



6- w. A. ANDERSON PAPER FEED MECHANISM Filed Nov. 28, 1930 4 Sheets-Sheet 1 Ewan/16f: wa, 1/1762" J7. .Hmdersmv Jan. 14,1936. w A ANDERSON I 2,027,572 PAPER FEED MECHANISM Filed Nov; 28, 1950' 4 Sheets-Sheet 2 ENG,

1936 w. A. ANDERSON PAPER FEED MECHANISM 4 Sheets-Sheet 3 Ufa] Filed Nov. 28, 1950 mm m HI 1 HI rlllllllllllllll ll II I AIIII Illll'lalllll lllllllll' l Jan. 14, 1936. w. A. ANDERSON PAPER FEED MECHANISM Filed Nov. 28, l930 4 Sheets-Sheet 4 1762767175": Ufa/7117611, J]. find/(31150774 a, W M m VIEWED FROM FRONT Patented Jan. 14, 1936 UNITED STATES PATENT OFFICE PAPER man MECHANISM Delaware Application November 28, 1930, Serial No. 498,566

7 Claims. (Cl. 197-414) This invention relates to means for rotating the platen of a typewriting or computing-printing machine. It has special reference to means for imparting relatively long movements to the work-piece or pieces. as, for example, when an imprint is to be made upon each of a series of bank checks.

It is difficult or impracticable to obtain feed or line-space movements of from, say, seveneighths of an inch to three and one-half inches from the moving part which is usually the source of power for line-spacing, hence I have provided a paper feed mechanism which is driven from another moving part and adapted to give relatively long feed movements. I have also provided means whereby the paper feed mechanism may be operated in alternate cycles of operations of the machine, as when a shuttle carriage is used.

A feature of the invention is the application of power for paper-feeding purposes to the lefthand end of the platen, thus making possible the use of a conventional line-space mechanism at the right-hand end for turning another section of the platen at a different rate.

In the accompanying drawings,

Figure 1 is a fragmental left-hand side elevation of a shuttle carriage machine embodying the present invention, the machine being shown at rest.

Fig. 2 is a view similar to that of Fig. 1, but showing the position assumed when the main rock shaft of the machine is at the end of its forward oscillation.

Fig. 3 is a detail view of a certain latch.

Fig. 4 is a fragmental rear view of the machine.

Fig. 4A is a perspective view of a portion of the paper feed devices.

Fig. 5 is a front view of a portion of the paper feed mechanism.

Fig. 6 is a'fragmental front view of the means for alternating the action of the paper feed mechanism.

Fi '7 illustrates a form of mechanism which produces a feed movement in every cycle of op- Pratinns of the machine.

While the invention may be embodied in computing and printing machines of various types. I have herein shown it as embodied in a machine of the general type di closed in French Patent No. 625,678, issued to The Sundstrand Corporation.

The paper carriage i is supported on the frame of the machine for lateral movement. The

platen A (Fig. 5) is mounted on a shaft 2 which is journaled in the paper carriage. On the lefthand end portion of said shaft is a pinion 3 that meshes with a spur gear 4 which is rotatably mounted on the axis 5 on the left-hand end of the paper carriage. The means for rotating the spur gear t comprises an arm 6 which is pivotally mounted on the axis 5. A pawl I is pivoted to the arm ii at 8 and is arranged to engage the teeth of the spur gear d during the forward swing of the arm 6.

To swing the pawl i into and out of engagement with the teeth of the spur gear I provide an arm 9 which is pivotally mounted on the axis 5 and is engaged by a friction brake spring Hi (Fig. 5). In the upper end of the arm 9 is an elongated opening M (Fig. i) in which lies a pin 12 on the dog 1. A projection, such as the pivot pin 8 on the pawl i, is arranged to engage the upper end of the arm 9. It will be seen that when the arm 6 is swung rearwardly in its return stroke the arm 9 will lag (because of the pressure to which it is subjected by the brake spring HI) until the pin t engages said arm 9. As a result of the relative movement between the arms 6 and the pawl i will be raised out of engagement with the spur gear t. Continuing rearward movement of the arm 5 will cause the arm 9 to swing rearwardly by reason of the engagement of the pin 8 with said arm. When the arm 6 is swung forwardly to commence a working stroke to rotate the platen, the arm 9 will at first lag, thereby causing the pawl i to swing downwardly into engagement with the spur gear t. 'Continuing forward movement of the arm t will cause the gear & to turn, the movement of the gear 6 being multiplied through its engagement with the pinion 3 so as to produce a relatively great movement of the platen.

The length of the line-space movement may be regulated by means such as a plate i3 pivotally adjustable upon the axis 5, said plate being arranged to be engaged by a roller stud i t on the pawl I at or near the end of the rearward swing of the arm 6. The plate l3 may be positioned to render ineffective more or less of the forward stroke of the pawl i.

The means for oscillating the arm 6 in any I sal actuating rod IS. The cradle is pivotally supported in the end plates of the paper carriage I at |9. Rigidly fixed to the left-hand end of the cradle is a plate 20 which constitutes a crank arm. In order that the amplitude of oscillation of the arm 6 may be regulated, the link I5 is adjustably connected to the crank arm 20 by means such as a stud 2| adjustably liked in an elongated opening 22 in said crank arm. It will be seen that as the cradle is rocked, the arm 6 will be oscillated to actuate the pawl 1.

The means for oscillating the cradle comprises a link 23 located adjacent to the left-hand side of the machine. The link 23 is bowed, as shown in Fig. 1, to clear a control plate l attached to the paper carriage. The upper end of said link is pivotally and slidably connected with the universal rod l8 to permit the paper carriage to travel transversely of the machine. Rigid with the upper end of the link 23 is a plate 24 which is slotted (as shown in Fig. 4) to fit slidably upon a vertically arranged guide plate 25 attached to the rear portion of the machine. The parts 24 and 25 prevent lateral displacement of the link 23 as the paper carriage is moved laterally.

The lower portion of the link 23 is connected to a part which oscillates in every'cycle of operations of the machine. The oscillating part alluded to is herein shown as a lever 26 which is pivoted in the machine frame at 21.

If a line-space movement is to occur in alternate cycles of operations of the machine, as, for instance, in the case of a machine which is equipped with a shuttle carriage, the link 23 may be connected to the lever 26 by means such as that shown in Figs. 1 and 2 hereof. In the lower end of the link 23 is an elongated curved opening 29. As shown in Fig. 1, when the cradle is in its initial or rest position, the opening 29 is concentric with the axis 21. A pin 30 carried by the lever 26 extends into the opening 29. When the pin 36 is permitted to slide up and down in the opening 29, no movement is imparted to the link 23. In order to cause the link 23 to move with the pin 30 when desired, I provide means comprising a latch 3| which is pivoted at 32 to the link 23. In the latch 3| is an elongated curved opening 33 adapted to register with the opening 29, the pin 30 extending into both of these openings. At the upper end of the opening 33 is an angular opening 34 to receive the pin 30. A contractile spring 35 which is connected to the link 23 at 36 and to the latch 3| at 31, tends to swing the latch in the direction to'cause the opening 34 to move into engagement with the pin 30. To move the latch in the opposite direction, I provide a stud 38 on the lever 26, said stud being arranged to engage the forward edge of said latch and press said latch back so as to place the opening 33 in register with the opening 29.

A slide 39 (Fig. 6) is mounted in the machine frame for horizontal transverse movement. On one end of said slide is a pin 40 which, in one position of the slide 39, underlies a lug 4| on the link 23 and thus prevents said link from descending far enough to impart effective movement to the pawl I. The slide 39 may be reciprocated by any preferred means, as, for example, that disclosed in the Sundstrand Patent No. 1,779,717, dated October 28, 1930. In alternate cycles of operations of the machine the pin 40 underlies the lug 4| and prevents effective downward movement,of the link 23. A spring 42 connected to the lever 23 and anchored to the machine frame tends to draw the link down.

Assuming that the parts are in the position shown in Fig. 1 and that the pin 46 is in the 5 path of the lug 4|: When the lever 26 swings in the counterclockwise direction, said lug will be detained by the pin 40 and the pin 30 will move down in the openings 29 and 33; thus no feed movement is imparted to the paper. The 1 pin 30 moves down past the angular opening 34 before the movement of the stud 38 releases the latch 3| to the action of the spring 35.

If we assume that the pin 40 is held out of the path of the lug 4| at the time the lever 26 starts to swing in the counterclockwise direction, the spring 42 causes the link 23 and the latch 3| to start moving down with the pin 36. In the continuing counterclockwise movement of the lever 26, the stud 38 moves away from the slotted portion of the link 23, and as it does so the spring 35 swings the latch 3| toward the right, as viewed as Figs. 1 and. 2, thereby placing the slotted part 34 in engagement with the pin 30. Consequently, in the remainder of the counterclockwise movement of the lever 26, the link 23 is positively drawn down, and in the return or clockwise movement of the lever 26 the link 23 is positively lifted, thereby turning the platen to feed the work-piece. As the lever 26 completes its return to initial position, the stud 38 forces the latch 3| rearwardly. thus withdrawing the slotted part 34 from the pin 30.

If a feed movement is to occur in every cycle of operations of the machine, the construction shown in Fig. 7'1nay be used, the link 42 being pivoted to the lever 26 at 43.

Means is provided for accurately positioning and holding the platen at the completion of a rotary movement. Said means includes a toothed or notched wheel 44 rigid with the pinion 3 and arranged to be engaged by a detent 4'5 pivoted on the axis 5. Rigid with the detent 45 is an arm 46. A spring 41 connected to said arm and anchored at 48 on the paper carriage 45 normally holds the detent in engagement with the wheel 44. To hold the detent out of action while the pawl l is turning the platen, I provide a latch 49 which is pivoted at 50 on the paper carriage, said latch having a shoulder 50 5| to engage a stud 52 on the arm 46. A spring 53 connected to the latch and anchored at 48 tends to move the latch into contact with the stud 52. On the crank arm 20 is a screw or other projection 54 which, in the downward 55 movement of said crank arm, strikes the arm 46 and thus raises the detent out of engagement with the wheel 44, thereby also lowering the stud 52 so that the shoulder 5| may spring into latching engagement with said stud. In the upward movement of the crank arm 20 the platen is turned by the pawl As the crank arm 26 is approaching the end of its upward stroke and the pawl is completing the operation of turning the platen, the projection 54 strikes a lug 55 on the latch 49 and disengages the latch from the stud 52, whereupon the spring 41 places the detent 45 in engagement with the wheel 44.

It will be seen that the mechanism herein disclosed permits of automatically rotating the platen or a section of the platen through a relatively long arc.

I claim as my invention:

1. In a machine of the class described, a platen and means for rotating the platen comprislatch into operative position, and a part arranged to move away from the latch when said member is moving in one direction to permit the spring to place the latch inoperative position and to engage said latch when said member moves in the opposite direction to place the latch in inoperative position.

2. In a machine of the class described, a platen and means for rotating the platen comprising a member arranged to reciprocate in each cycle of operations of the machine, a pin on said member, a link having an opening therein, a latch pivoted to said link and having an opening therein adapted to register with the opening in the link, said latchalso having an annular opening communicating with the opening in the latch, said pin extending into both 01' the first-mentioned openings, a spring tending to swing the latch in the direction to place said angular opening in engagement with the pin, a spring tending to cause the link to move with the pin when the latter is moving in one direction, and a stud on said memben arranged to move away from the latch when said member is moving in the last-mentioned direction to permit the first spring to move said angular opening into engagement with the pin, and to engage said latch when said member moves in the opposite direction to disengage said angular opening from said pin, and means to prevent the link from following said pin when the latter is moving in the first-mentioned direction.

3. In a machine of the class described, a platen and means for rotating the platen comprising a member arranged to oscillate in each cycle of operations of the machine, a pin on said member, a link having a curved opening therein; a latch pivoted to said link and having a curved opening therein adapted to register with the opening in the link, said latch also having an angular opening communicating with the opening in the latch, said pin extending into both of said curved openings, a spring tending to swing the latch in the direction to place said angular opening in engagement with the pin, a spring tending to cause the link to move with the pin when the latter is moving in one direction, a stud on said member arranged to move away from the latch when said member is swinging in the last-mentioned direction to permit the first spring to move said angular opening into engagement with the pin, and

.to engage said latch when said member swings in the opposite direction to disengage said angularopening from said pin, and means to prevent the link from following said pin when the latter is moving in the first-mentioned direction.

4. In a machine of the character described, a platen, and means for rotating the platen comprising a member arranged to oscillate about a fixed axis in each cycle of operations of the machine, a pin on said member, a link having an opening therein to freely receive said pin, said opening being arranged concentrically of the axis of said member, a latch pivoted to said link and having an opening therein adapted to register with the opening in said link, said latch also having an opening communicating with and angularly disposed to said first mentioned opening, a spring tending to pivot the latch in a direction to place said angular opening in engagement 5 with the pin, a spring tending to cause the link to move with the pin when the latter is moving in one direction, a stud on said member normally acting to'oppose movement of said latch to position said pin in said angular opening, and means to prevent the link from following said pin when the latter is moving in the first mentioned direction, a

' 5. In a machine of the class described, a platen, and means for rotating the platen, com- 15 prising a member arranged to oscillate about a fixed axis in each cycle of operations of the machine, a pin on said member, a link having an opening therein concentric with the axis of said member and adapted to freely receive said 20 pin, a latch pivoted to said link and having an opening therein adapted to register with the opening in said link, said latch also having an opening communicating with said first mentioned opening to define a means of connecting 26 said latch with said pin, a spring tending to move the latch in a direction to establish a connection between said communicating opening and said pin, and a stud on said member normally acting to oppose movement of said latch to position said pin in said communicating opening.

6. In a machine of the class described, a platen and means for rotating the platen including a lever and a gear, means efiective to oscillate said lever as an incident to a cyclic operation of 35 the machine, a second lever pivoted co-axially with the first mentioned lever, means normally tending to restrain said second mentioned lever against movement, means providing a delayed, one way driving connection, between said first 40 and, second mentioned levers to impart movement to said second mentioned lever at a time subsequent to the beginning of movement of the first-mentioned lever, a pawl pivotally supported on said first-mentioned lever and arranged to 45 drivingly engage said gear, and an operating connection between said second-mentioned lever and said pawl.

'7. In a machine of the class described, a platen and means for rotating the platen compris- 50 ing a pinion, a spur gear wheel in constant meshing engagement with the pinion, a pawl, lever means to reciprocate said pawl, a second lever means pivotally connected to said pawl to move the latter into and out of driving engagement 55 with said gear wheel, said second mentioned lever being arranged to reciprocate in lagging relation with respect to said first mentioned lever to effect movement of the pawl out of engagement with the gear wheel at the beginning of movement of said first mentioned lever in one direction, and into engagement with the gear at the beginning of movement of the first mentioned lever in a reverse direction, and means to actuate said first mentioned lever, including a. 05 member having a pin and slot connection with a part arranged to oscillate in each cycle of operations of the machine.

WALTER A. ANDERSON. Z0 

